PC2100 in my 2500 board if I remember correctly but it is standard ECC DDR, super cheap and easy to come by

A word of warning--pay attention to your OpenBoot revision and the CAS latency. I believe all of these PC2100-based Suns are only spec'ed at CL2.0, which is a bit harder to find than the CL2.5 PC2100 ECC that's all over.

I've had little trouble actually running a Blade 1500 with CL2.5 PC2100 with OpenBoot 4.9.x, but upgrading to 4.14 or higher will prevent the system from booting on anything that's not CL=2.0. I had to downgrade from 5GB to 1GB for this reason

PC2100 in my 2500 board if I remember correctly but it is standard ECC DDR, super cheap and easy to come by

A word of warning--pay attention to your OpenBoot revision and the CAS latency. I believe all of these PC2100-based Suns are only spec'ed at CL2.0, which is a bit harder to find than the CL2.5 PC2100 ECC that's all over.

I've had little trouble actually running a Blade 1500 with CL2.5 PC2100 with OpenBoot 4.9.x, but upgrading to 4.14 or higher will prevent the system from booting on anything that's not CL=2.0. I had to downgrade from 5GB to 1GB for this reason

Strange that you did get more problems when upgrading openboot, I have had a 2500 since new with 16GB but at that time I hade 8 GB from Crucial and 8GB from Dataram which did not interleave fully, only the Dataram did work(CPU0) but after upgrading Openboot last summer the memory banks interleaves as they should which probably means that Openboot now properly reads the DRAM info from the DIMM.

Hey, folks!
I'm interesting what is practical memory room limit for Blade 2500 RED one?
I presume that 2500 both Red and Silver share the same components (at least I/O), and the fall of memory size in twice from Silver to Red (from 16bg total (two 2gb quadpairs) with both cpu utilization in Silver to total 8gb (two 1gb quadpairs) in Red) as referred by manual is only OpenBoot program limitation, or even manual says configurations for which Sun was really responsible, am i right? Does anybody checked it?

P.S.: Can anobody also tell me about what specifially dictate the CPU difference in Red and Silver? Device recognizing in OpenBoot FCode?

I have a strong suspicion that you can load up a Red 2500 to at least 8x2GB. I've put 2GB sticks in my Red 1500 and gotten it up to 5GB (2x2048 and 2x512) of working, addressable memory despite the max being listed as 4x1024.

dukzcry wrote:

Can anobody also tell me about what specifially dictate the CPU difference in Red and Silver?

I'm pretty sure the only difference is a jumper on the motherboard. I would be very surprised if you couldn't put a 1.6GHz processor in a red's motherboard, switch that jumper setting, and have everything work fine. This is why I also suspect a red motherboard will take the full 16GB.

PC2100 in my 2500 board if I remember correctly but it is standard ECC DDR, super cheap and easy to come by

I have not found any cheap ECC PC2100 RAM in 2G sticks with 2.0 latency. Like somebody else said the 2.5 seem a lot more common. But they are also not cheap. Where are you guys finding all this hardware bounty?

eBay stuff comes and goes but have not found this ram cheaper than $15 a gig and that was for cl2.5. That works out to 240 bucks for 16G of used RAM in who knows what kind of condition. What's a good price on this stuff?

Somewhere there is a list of what RAM speeds and latencies are supported by what OpenBoot version. The SunFire servers came with PC2100 but the later OBP allowed you to go higher.

I realize you can use 2.5 latency but it's slower than the spec'd ram. These boxes are fast for what they are but there's no reason to handicap them if you can still find CL2.0 sticks. Ok, 2G for 8 EUR is a good reason

2xSM81's
currently 320Mb ram... but I have more.
No VSIMM only a cgsix.
QFE
and a single 143Gb SCA drive.

I am thinking I need extra cooling to be on the safe side here... as the floppy drive is likely to never be used I imagine I can use the power from there to run extra fans. Ideally i can see need for 3 fans... one between the PSU and the MBUS. One by the drives and one to pull air out on the opposite side of the PSU dunno if the floppy wiring can run all that. So maybe I could take it from the CD drive. Which is not likely to see much use either being only a 2x drive.

It looks like I can only fit a 60 or 70mm fan :/ unless I were to mount it horrizontally